Free standard shipping

Most orders received by 2:30PM ET (M-F) ship the same day.Please see our shipping map below for estimated times.

Estimated standard delivery times

Most orders ship from Ontario with delivery time between 1-7 business days. Business days include Monday through Friday, and exclude national holidays. Please provide a physical address for delivery whenever possible, as postal boxes may lead to delays.

Expedited shipping options are available on most orders between 1-3 business days. Select your preferred upgrade during the checkout process. For questions regarding shipping, call 1.800.297.9469.

Ask an expert

Our take on the Alpine KTP-445A Power Pack
by Crutchfield's Buck Pomerantz

Trying to save the image size to medium

More power for your Alpine receiver

Want a simple way to kick up the power of your Alpine receiver? Alpine's "Power Pack" amplifier increases your Alpine receiver's power output to 45 watts RMS power by 4 channels — plenty of power to drive high-performance speakers or keep up with a big subwoofer amplifier.

Product Research

Features

Overview: The Alpine KTP-445A Head Unit Power Pack is an
easy-to-install power upgrade amplifier that allows you to add higher output and
more dynamic response to your Alpine head unit. The KTP-445A amplifies your
Alpine head unit's power output, resulting in a 150% power increase over
the original power from the head unit's built-in amplifier.

Notes:

If the fuse protecting the OEM radio is less than 15 Amps, you should run a separate +12V constant power wire from the battery to the higher-powered Alpine KTP-445A.

The Alpine Power Pack amp will not work in systems where an outboard
factory amplifier is still active. If used in vehicles with a factory amplifier, the
factory amp will need to be completely bypassed (this may result in lost speaker
channels, if factory amp has more than 4 channels).

The increase in power
may result in a louder warning chime in certain vehicles.

Compatibility: The KTP-445A connects to any 2005 and newer Alpine head unit that has a black
16-pin wiring harness. Please check with your Crutchfield Product
Advisor to confirm compatibility.

45 Watt x 4 Channel Amplifier: The Alpine KTP-445A Head Unit
Power Pack employs a 45 watt x 4 channel amplifier. The amplifier offers an
unbelievably low noise floor, taking extra care to ensure a clean signal path,
with no extraneous interference. The end result is a 1 Watt Signal-to-Noise
Ratio of 82dB or better. Uniquely, the amplifier distortion actually decreases
at higher frequencies, resulting in a clean and clear signal where your ear is
most sensitive to distortion.

Note: The specifications given by Alpine for the built-in
amplifier comply with the CEA-2006 mobile amplifier power testing and
measurement standards from the CEA (Consumer Electronics Association). All
manufacturers who comply with the standard can display the CEA-2006 logo on
their product.

Installation: Since the KTP-445A is small and compact, it
installs behind your Alpine head unit in the dash of most vehicles. Installation
is simple with no special
tuning. The 39" grey connector harness plugs into one end of the Head Unit
Power Pack and connects to the rear plug on your Alpine head unit. The 31"
black
connector harness plugs into the other end of the Head Unit Power Pack and
connects to your Alpine receiver's harness (included with your
Alpine receiver). You will need to splice or crimp the wires from the Alpine
receiver's harness to a Crutchfield vehicle harness adapter (sold separately).

Note: The factory radio circuit needs to be a minimum of
15A. If it is not, a separate power and ground will need to be installed for
the KTP-445A

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.